n : the more anterior of the two ridges of soft tissue at the back of the mouth on each side that curves downward from the uvula to the side of the base of the tongue forming a recess for the palatine tonsil as it diverges from the palatopharyngeal arch and that is composed of part of the palatoglossus with its covering of mucous membrane - called also anterior pillar of the fauces , glossopalatine arch .